[M-IS23] 山の科学

[MIS23-16] 新潟県苗場山小松原湿原群の花粉分析からみた亜高山帯針葉樹林の発達過程

★招待講演

*吉田 明弘¹、百原 新²、工藤 雄一郎³、谷口 康浩⁴ (1.鹿児島大学、2.千葉大学、3.学習院女子大学、4.國學院大學)

キーワード：花粉分析、モミ属花粉、亜高山帯針葉樹林、苗場山、中部日本、完新世

Our reconstruction of vegetation changes from the well-dated pollen records since the early Holocene at Komatsubara peat bogs, Mt. Naeba, advanced our understanding vegetation history on the sub-alpine zone. The pollen records from the Shimo-no-shiro (1,330m a. s. l.) and Kami-no-shiro (1,570m a. s. l.) peat bogs indicate that Abies pollen appeared continuously from ca. 5,000-4,500 cal BP, at least. Additionally, our spatio-temporal comparison of pollen records from different altitude sites on Mt. Naeba shows that the distribution of Abies mariesii moved gradually to a higher altitude from the middle Holocene to the present. It is highly possible that the geomorphological environment and soil development on the alpine area influenced the colonization of Abies mariesii.